Welcome to TPF!
I love the light and shadows on the first one. Very nice. It appears slightly titled to the right, but not too bad. Maybe it the ilusion of the tree leaning, but the horizon looks slightly tilted. Anwyay, I like it. I would like to see it less bright for my taste. Anyway, you said you are just starting out, this is a good start.

The scond one has interesting lines leading your eyes up the tree. I like the view of looking up through trees, so naturally, this one is appealing to me.

Hi there, and welcome to the fun. I love the colors in the first one. And the third one is very interesting but the sign takes away for me. I think I would have removed it. Great first shots. Keep em coming.

You're making a good start! Keep shooting and don't forget to look at other people's work... and always always always have a goal in mind or something you want to fix. The moment you become happy with your work is the moment you stop improving!